Effects of Macrobends on the Attenuation of Optical Signals in Multi-Mode Graded Index 62.5/125 µm Cable at 850 nm Wavelength

  • Egerjst Egerton University
  • Chombah, J.M.1*
Keywords: Macrobend Attenuation, Optical Signal, Multi-Mode Fibre cable

Abstract

In fibre optic transmissions, macrobend is a large visible bend in the optical fiber that can cause  attenuation, a reduction of optical power in the glass. A relatively large- radius bend in an optical fibre may results to the degradation of the optical signal. In this paper, different magnitudes of circular macrobends in graded index 62.5/125 cable at 850 nm wavelength were used to determine the effect of macrobends on attenuation of signals. A special bending jig was used to produce circular bends ranging from 3mm to 200mm. The insertion method was used while attenuation (signal power loss) was measured in decibels (dB). Statistical analysis software (SAS) at a significant level of 5 per cent (and least significant difference

(LSD) ranking method were used for data analysis. The findings showed that large magnitude of macrobend radii (above 40.0 mm) resulted in low attenuation (about 9.0 dB) of signals, while small size bend radii (about 3.0 mm) produced very high (about 40.0 dB ) of signal losses. The research findings indicate that macrobends have significant effects on the attenuation of optical signals.

Author Biography

Chombah, J.M.1*

Chombah, J.M.1*, Gwaro J.O2., Nyaanga, D.M3 and Kirui, M.S.K4

  • Faculty of Engineering, Multimedia University College of Kenya,

P.O Box 7199-00300 Nairobi.Email:jmchombah@gmail.com

  • School of Science, Physics Department, Narok University College,

P.O.  Box 861, Narok, Email:gwaomb@yahoo.com

3

Faculty of Engineering and Technology, Egerton University, P.O Box 536, Egerton

Email:nyangaus@yahoo.com

4 Faculty of Science, Egerton University, P.O Box 536, Egerton. 

Email: mskkirui@yahoo.com

Received: 14th Dec., 2011;    Revised: 8th June., 2012; Accepted: 5th Oct., 2012 

Published
2012-04-23
How to Cite
Egerjst, & J.M.1C. (2012). Effects of Macrobends on the Attenuation of Optical Signals in Multi-Mode Graded Index 62.5/125 µm Cable at 850 nm Wavelength . Egerton Journal of Science and Technology, 12(1-179). Retrieved from https://eujournal.egerton.ac.ke/index.php/EJ/article/view/3
Section
Published Articles

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